Planetary Gearboxes - Logismarket

12. VERIFICATION
After selecting the drives units, please check the following:
a) Thermal power
Make sure that thermal power of the gearbox (shown in the tables in the chapters dealing with the gear unit
series captioned) is equal to or greater than the power required by the application according to equation (F5) on
page 5. If this condition is not respected, select larger gearbox or apply a forced cooling system.
Example of oil re-circulation cooling system:
Bb
b) Maximum torque
Make sure that the maximum torque (considered as instantaneous load peak torque or starting torque under
load) does not exceed the M 2max value that the gearbox can withstand. (Refer to the technical data
tables concerning the gearboxes sizes.)
c) Radial loads
Check that radial loads exerted on input and output shafts are lower than or equal to values
indicated in the tables on gearbox technical features or charts for each gearbox size. In case they
are grater the indicated value, change either gearbox output version, gearbox size or system
bearing arrangement.
To check proceed as follows:
Define radial loads Rc 1 at input and Rc2 at output.
Rc 1 =2000Mc 1 Kr 1 /d 1 (F18)
Rc 2 =2000Mc 2 Kr 2 /d 2 (F19)
In which:
Mc 1 , Mc 2 ------ Input and output calculated torque (N.m)
d 1 , d 1 ------------Diameter of the part fitted onto the shaft (mm), pulley, gear or chain crown.
Kr 1 , Kr 2 -------Stress factor for radial load with following values
Chain crown-------1.0
Gear ----------------1.25
Belt pulley--------------1.5-2.5
Planetary Gearboxes | 9 | B r o w n A d v a n c e